ICD-10 Code E10.638 – Type 1 diabetes mellitus with other oral complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E10.638 – Type 1 diabetes mellitus with other oral complications
What it is
This code identifies type 1 diabetes mellitus with oral complications that are not classified elsewhere. Use it when the record links the patient’s diabetes to a specific mouth-related complication.
Clinical signs
Clinical features vary; refer to documentation. Oral findings may include complications involving the teeth, gums, or other mouth tissues when the provider documents a diabetes-related oral condition.
When to use this code
Use E10.638 when the clinician documents type 1 diabetes and a related oral complication, and the chart supports that relationship. It is appropriate when the oral problem is not better described by a more specific code. Check documentation if the oral condition is mentioned without a clear diabetes link.
Do not use for
Do not use this code for type 2 diabetes or for oral disorders unrelated to diabetes. If the oral complication is specified elsewhere in ICD-10-CM, code that more precise diagnosis instead.
Coding tip
Look for explicit provider wording that connects the oral complication to type 1 diabetes before assigning E10.638.